Why do people use telephones?
Very simply, to communicate when the distance between them is
too great to speak face to face. But sadly, on more than one
occasion, I have observed two dummies, while side by side,
communicating with each other on cellfones !!! I guess they thought
it was "cute," and their parents must have had more money than they
or their kids had brains. It's an extremely useful and quick means
of communication. Before the telephone was invented (and became
widespread) people were dependent on mail services for
communication over distance. Even if the mail service was
efficient, just imagine the time for a short postal message to
travel by surface from, say, a small place in Maine to another
small place in, say, the Mississippi Delta!